ASTROSAT CZTI

Data Quality Report

Orbit 58874

Creation date: 2026-08-15T12:16:19.321333
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

Source files: Data quality report (detailed, human readable) | Data quality report (concise, machine readable)

Observation information


Basic statistics of files

Param Original file Final file
FilenamemodeM0/AS1A14_004T07_9000006598_58874cztM0_level2.fits modeM0/AS1A14_004T07_9000006598_58874cztM0_level2_quad_clean.evt
Size (bytes)1,062,506,88068,218,560
Size1013.3 MB 65.1 MB
Events in quadrant A5,404,488643,979
Events in quadrant B3,985,467710,899
Events in quadrant C16,707,08360,722
Events in quadrant D12,723,070189,276

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0205622
B0161892
C0542152
D0422892

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160
B0170
C0170
D0170

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A66073795.736340%
B66062363.572510%
C6606610392.385710%
D6606461069.785044%

Noise dominated fraction

Noise dominated data is calculated using 1-second bins in cleaned event files. If a bin has >2000 counts, and if more than 50% of those come from <1% of pixels, then it is considered to be noise-dominated and hence unusable.

Quadrant # 1 sec bins Bins with >0 counts Bins with >2000 counts High rate bins dominated by noise Noise dominated (total time) Noise dominated (detector-on time) Marked lightcurve
A 7712 6607 256 256 3.32% 3.87%
B 7711 6606 101 101 1.31% 1.53%
C 7710 6605 6007 6007 77.91% 90.95%
D 7711 6606 4455 4455 57.77% 67.44%

Top noisy pixels

Top three noisy pixels from each quadrant. If the there are fewer than three noisy pixels in the level2.evt file, extra rows are filled as -1

Pixel properties Quadrant properties
Quadrant DetID PixID Counts Sigma Mean Median Sigma
A 14 238 1566677 8536.12 747 727 183.4
A 3 14 641178 3491.15 747 727 183.4
A 15 233 110830 600.18 747 727 183.4
B 5 172 670159 4196.85 746 719 159.5
B 4 236 142308 887.65 746 719 159.5
B 4 201 78248 486.04 746 719 159.5
C 9 38 15320411 179230.78 307 304 85.5
C 12 252 61552 716.54 307 304 85.5
C 6 223 40029 464.74 307 304 85.5
D 12 110 9863351 71086.38 482 460 138.7
D 8 160 742000 5344.62 482 460 138.7
D 3 12 47778 341.04 482 460 138.7

Detector plane histogram (DPH)

Histogram calculated using DETX and DETY for each event in the final _common_clean file

Quadrant A Quadrant B
Quadrant D Quadrant C

Count rate plots and images

Plot type Count rate plots Images
Comparison with Poisson distribution
Blue bars denote a histogram of data divided into 1 sec bins.
Red curve is a Poisson curve with rate = median count rate of data.
Quadrant-wise count rates
Data is divided into 100 sec bins
Module-wise count rates for Quadrant A
Data is divided into 100 sec bins
Module-wise count rates for Quadrant B
Data is divided into 100 sec bins
Module-wise count rates for Quadrant C
Data is divided into 100 sec bins
Module-wise count rates for Quadrant D
Data is divided into 100 sec bins

Housekeeping plots

Parameter Plot
CZT HV Monitor
D_VDD
Temperature 1
Veto HV Monitor
Veto LLD
Alpha Counter
_CPM_Rate
CZT Counter
+2.5 Volts monitor
+5 Volts monitor
_ROLL_ROT
_Roll_DEC
_Roll_RA
Veto Counter

TCT plots

Parameter TCT0 TCT_healed
Tct